Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoa nganh » hoc nganh, khoi nganh, hoa doanh
trung hoc » trung quoc
cach hoi » cach thoi, cach noi, cach hoc
cong hoa » dong hoa, dong hoc, hang hoa
nhan van » nhan dan, nhan va, phan van
tu cach » tu cac
va nhan » van nhan, ca nhan, va phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoi dap, nghien thu cong hoa nganh ((dung thuoc) or (trung hoc)) xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoi dap, nghien thu cong hoa nganh ((dung thuoc) OR (trung hoc)) xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: tu cach hoi dap, nghien thu cong hoa nganh ((dung thuoc) or (trung hoc)) xa hoi va nhan van*.